The Changing of the Mach number as a Factor of Influence on the Interference Hysteresis of the Counterclaims Shock Waves

Bulat, P.V.; Denissenko, P.V.; Prodan, N.V.; Upyrev, V.V.

Авторы: Bulat P.V., Denissenko P.V., Prodan N.V., Upyrev V.V.
Журнал: International Journal of Applied Engineering Research
Том: 11
Номер: 23
Год издания: 2016
Первая страница: 11228
Последняя страница: 11236
Аннотация: The article deals with the investigations of the counterclaims shock waves interference and the slanting shock wave reflection from the wall. Two main regimes of interaction of counterclaims shocks exist, such as a four-wave regular and a five-wave irregular. The transition from one mode to another can be acute, fluent and can also be accompanied by a hysteresis, which is the possible existence of two different types of shock-wave structures with the same parameters of interference. The fact of hysteresis in the interference of counterclaims shocks and the oblique shock wave reflection from a wall have been studied since the mid-60s of the 20th century, but many outstanding questions remain. The problem occurs when the results of numerical and physical experiments try to match with the data obtained by an analytical theory of the interference of stationary gas-dynamic discontinuities and they do not coincide. This study examines the impact of two factors, i.e., the rank of a difference grid and the blur degree of a shock wave front. Analytical and numerical calculations show , that blurring of shock waves and the transition from a small difference grid to the coarser accompanied by a narrowing of the hysteresis region, so the transition from regular to irregular reflection and back is another than predicted by theory. So, decreasing the size of grid cell leads to the convergence of the solution to the results of the theory of interference of stationary gas-dynamic discontinuities.
Добавил в систему: Булат Павел Викторович

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The Changing of the Mach number as a Factor of Influence on the Interference Hysteresis of the Counterclaims Shock Wavesстатья

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